#include <sys/time.h>
#include <fcntl.h>
#include <pthread.h>
#include <stdio.h>
#include <string.h>

#include <sys/types.h>  
#include <sys/stat.h> 
#include <fcntl.h>
#include <errno.h>  
#include <sys/wait.h>

#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <termios.h>
#include <errno.h>
#include <string.h>

#include <sys/mman.h>
#include <sys/stat.h>

#include "iic_comm_firmware.h"

//#include <fcntl.h>
//#include <stdio.h>
//#include <stdlib.h>
//#include <unistd.h>
//#include <error.h>

#define MAX_WCNT_OUT 10	//需要小心控制重试次数和间隔时间




#define FIRM_DUB 1
#ifdef FIRM_DUB
#define dbg	printf
#else
#define dbg(...) do{}while(0)
#endif



static uint32_t  slave_ack_idx=0;
static uint32_t	 task_send_len= 0;	//需要发送的升级文件长度，也是发送固件任务的标志
const uint8_t *firmware_buf; //128k
static uint8_t pack_buf[BAK_REGION_LEN];  //2k+



static uint32_t calculateCRC32 (const uint8_t *pStart, uint32_t uSize)
{
    
  static const uint32_t CRC32_Table[256] =
  {
     0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA,
     0x076DC419, 0x706AF48F, 0xE963A535, 0x9E6495A3,
     0x0EDB8832, 0x79DCB8A4, 0xE0D5E91E, 0x97D2D988,
     0x09B64C2B, 0x7EB17CBD, 0xE7B82D07, 0x90BF1D91,
     0x1DB71064, 0x6AB020F2, 0xF3B97148, 0x84BE41DE,
     0x1ADAD47D, 0x6DDDE4EB, 0xF4D4B551, 0x83D385C7,
     0x136C9856, 0x646BA8C0, 0xFD62F97A, 0x8A65C9EC,
     0x14015C4F, 0x63066CD9, 0xFA0F3D63, 0x8D080DF5,
     0x3B6E20C8, 0x4C69105E, 0xD56041E4, 0xA2677172,
     0x3C03E4D1, 0x4B04D447, 0xD20D85FD, 0xA50AB56B,
     0x35B5A8FA, 0x42B2986C, 0xDBBBC9D6, 0xACBCF940,
     0x32D86CE3, 0x45DF5C75, 0xDCD60DCF, 0xABD13D59,
     0x26D930AC, 0x51DE003A, 0xC8D75180, 0xBFD06116,
     0x21B4F4B5, 0x56B3C423, 0xCFBA9599, 0xB8BDA50F,
     0x2802B89E, 0x5F058808, 0xC60CD9B2, 0xB10BE924,
     0x2F6F7C87, 0x58684C11, 0xC1611DAB, 0xB6662D3D,
     0x76DC4190, 0x01DB7106, 0x98D220BC, 0xEFD5102A,
     0x71B18589, 0x06B6B51F, 0x9FBFE4A5, 0xE8B8D433,
     0x7807C9A2, 0x0F00F934, 0x9609A88E, 0xE10E9818,
     0x7F6A0DBB, 0x086D3D2D, 0x91646C97, 0xE6635C01,
     0x6B6B51F4, 0x1C6C6162, 0x856530D8, 0xF262004E,
     0x6C0695ED, 0x1B01A57B, 0x8208F4C1, 0xF50FC457,
     0x65B0D9C6, 0x12B7E950, 0x8BBEB8EA, 0xFCB9887C,
     0x62DD1DDF, 0x15DA2D49, 0x8CD37CF3, 0xFBD44C65,
     0x4DB26158, 0x3AB551CE, 0xA3BC0074, 0xD4BB30E2,
     0x4ADFA541, 0x3DD895D7, 0xA4D1C46D, 0xD3D6F4FB,
     0x4369E96A, 0x346ED9FC, 0xAD678846, 0xDA60B8D0,
     0x44042D73, 0x33031DE5, 0xAA0A4C5F, 0xDD0D7CC9,
     0x5005713C, 0x270241AA, 0xBE0B1010, 0xC90C2086,
     0x5768B525, 0x206F85B3, 0xB966D409, 0xCE61E49F,
     0x5EDEF90E, 0x29D9C998, 0xB0D09822, 0xC7D7A8B4,
     0x59B33D17, 0x2EB40D81, 0xB7BD5C3B, 0xC0BA6CAD,
     0xEDB88320, 0x9ABFB3B6, 0x03B6E20C, 0x74B1D29A,
     0xEAD54739, 0x9DD277AF, 0x04DB2615, 0x73DC1683,
     0xE3630B12, 0x94643B84, 0x0D6D6A3E, 0x7A6A5AA8,
     0xE40ECF0B, 0x9309FF9D, 0x0A00AE27, 0x7D079EB1,
     0xF00F9344, 0x8708A3D2, 0x1E01F268, 0x6906C2FE,
     0xF762575D, 0x806567CB, 0x196C3671, 0x6E6B06E7,
     0xFED41B76, 0x89D32BE0, 0x10DA7A5A, 0x67DD4ACC,
     0xF9B9DF6F, 0x8EBEEFF9, 0x17B7BE43, 0x60B08ED5,
     0xD6D6A3E8, 0xA1D1937E, 0x38D8C2C4, 0x4FDFF252,
     0xD1BB67F1, 0xA6BC5767, 0x3FB506DD, 0x48B2364B,
     0xD80D2BDA, 0xAF0A1B4C, 0x36034AF6, 0x41047A60,
     0xDF60EFC3, 0xA867DF55, 0x316E8EEF, 0x4669BE79,
     0xCB61B38C, 0xBC66831A, 0x256FD2A0, 0x5268E236,
     0xCC0C7795, 0xBB0B4703, 0x220216B9, 0x5505262F,
     0xC5BA3BBE, 0xB2BD0B28, 0x2BB45A92, 0x5CB36A04,
     0xC2D7FFA7, 0xB5D0CF31, 0x2CD99E8B, 0x5BDEAE1D,
     0x9B64C2B0, 0xEC63F226, 0x756AA39C, 0x026D930A,
     0x9C0906A9, 0xEB0E363F, 0x72076785, 0x05005713,
     0x95BF4A82, 0xE2B87A14, 0x7BB12BAE, 0x0CB61B38,
     0x92D28E9B, 0xE5D5BE0D, 0x7CDCEFB7, 0x0BDBDF21,
     0x86D3D2D4, 0xF1D4E242, 0x68DDB3F8, 0x1FDA836E,
     0x81BE16CD, 0xF6B9265B, 0x6FB077E1, 0x18B74777,
     0x88085AE6, 0xFF0F6A70, 0x66063BCA, 0x11010B5C,
     0x8F659EFF, 0xF862AE69, 0x616BFFD3, 0x166CCF45,
     0xA00AE278, 0xD70DD2EE, 0x4E048354, 0x3903B3C2,
     0xA7672661, 0xD06016F7, 0x4969474D, 0x3E6E77DB,
     0xAED16A4A, 0xD9D65ADC, 0x40DF0B66, 0x37D83BF0,
     0xA9BCAE53, 0xDEBB9EC5, 0x47B2CF7F, 0x30B5FFE9,
     0xBDBDF21C, 0xCABAC28A, 0x53B39330, 0x24B4A3A6,
     0xBAD03605, 0xCDD70693, 0x54DE5729, 0x23D967BF,
     0xB3667A2E, 0xC4614AB8, 0x5D681B02, 0x2A6F2B94,
     0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B, 0x2D02EF8D
  };
  uint32_t uCRCValue;
  uint8_t *pData;

  uCRCValue = 0xFFFFFFFF;
  pData = (uint8_t*)pStart;
  while (uSize --)
  {
    uCRCValue = CRC32_Table[(uCRCValue ^ (*(pData++))) & 0xFF] ^ (uCRCValue >> 8);
  }
  return uCRCValue ^ 0xFFFFFFFF;

}

static  volatile uint32_t fw_retry_tick;
static  volatile uint32_t fw_disconnect_tick;

uint8_t fw_get_interval_retry(uint32_t u_ms)
{
	return app_capture_interval(&fw_retry_tick, u_ms);
}
void fw_uptime_retry(void)
{
	app_update_interval(&fw_retry_tick);
}


uint8_t fw_get_interval_disconnect(uint32_t u_ms)
{
	return app_capture_interval(&fw_disconnect_tick, u_ms);
}

void fw_uptime_disconnect(void)
{
	app_update_interval(&fw_disconnect_tick);
}


void save_slave_firmware_ack(uint32_t idx)
{
	slave_ack_idx= idx;	
}
uint32_t get_slave_firmware_ack()
{
	return slave_ack_idx;
}

uint32_t check_firmware_databuf(const uint8_t* databuf, uint32_t datalen)
{
	uint32_t cal_val;
	bin_head *pdata= (bin_head*)databuf;
	
	if(datalen < BIN_HEAD_LEN){
		printf("firmware len < BIN_HEAD_LEN \n");
		return 0;
	}
#if 1 	
	printf("model :%x ,",pdata->model);
	printf("version :%x ,",pdata->version);
	printf("data_len :%x ,",pdata->data_len);
	printf("crc32val :%x\n",pdata->crc32val);
#endif	

	if(datalen != pdata->head_len + pdata->data_len){
		printf("firmware len do not match head description \n");
		return 0;
	}
	
	if(pdata->model != BOARD_MODEL){
		printf("firmware magic number (board model) don't match \n");
		return 0;
	}
	
	cal_val= calculateCRC32(databuf+ pdata->head_len, pdata->data_len);
	if(cal_val != pdata->crc32val){
		printf("firmware crc32val= %08X, but calculate val= %08X \n", cal_val, pdata->crc32val);
		return 0;
	}
	
	return 1;
}

static void pack_init(void);

uint32_t pack_firmware(const uint8_t* databuf, uint8_t* packbuf)
{	
	uint32_t len;
	bin_head *pdata= (bin_head*)databuf;
	updata_bak_region *firmware= (updata_bak_region*)(packbuf);
	firmware->model= pdata->model;
	firmware->version= pdata->version;
	firmware->file_len= pdata->data_len+ BIN_HEAD_LEN;
	firmware->flash_bak_base= APP_RUN_ADDR;
	len= firmware->file_len - firmware->region_idx;
	dbg("idx=%d len=%d\n\n", firmware->region_idx ,len);
	if(len > max_pack_len)
		len= max_pack_len;
    dbg("remain len = %d\n", len);
	if(firmware->region_idx < max_buf_len)
		memcpy((uint8_t*)firmware->flash_data, databuf+firmware->region_idx, len);
	else{
		printf("region_idx too long\n");
	}
#if 0

	for(i=0; i< len/4; i++){
		printf("%08X ", firmware->flash_data[i]);
	
	}
	printf("\r\n");
#endif	
	firmware->crc32val= calculateCRC32((uint8_t*)firmware->flash_data, len);
	firmware->data_len= len;
	printf("pack firmware pack, idx=%d ,len=%d\n", firmware->region_idx, firmware->data_len);
	return len;
}




static void pack_init(void)
{
    const bin_head *pdata= (const bin_head*)firmware_buf;
	pack_firmware((uint8_t*)pdata, (uint8_t*)pack_buf);
}




static void update_timer(void)
{
	fw_uptime_retry();									//更新重发pack的计时器
	fw_uptime_disconnect();								//更新放弃固件升级的计时器
}





static void update_start(void)
{
	bin_head *pdata= (bin_head*)firmware_buf;
	save_slave_firmware_ack(0);					 		//从机应答，已收字节数
	memset(pack_buf, 0, BAK_REGION_HEAD_LEN);	 		//清空pack的头部
	task_send_len= pdata->head_len+ pdata->data_len;    //整个升级文件的长度
	pack_init();
	update_timer();
}


static void relase_firmware_buf(uint32_t len)
{
    if(firmware_buf != NULL) {
        if ((munmap ((void *) firmware_buf, len)) == -1) {
            printf("update file munmap err\n");
        }
    }
    firmware_buf = NULL;
}

static void update_end(void)
{
    relase_firmware_buf(task_send_len);
    task_send_len = 0;
}

int firmware_file_check(void)
{
const char *update_path1 = "update.bin";
//const char *update_path2 = "/media/sda1/newstar_lcd_update.bin";

    int fd, filelen;
    struct stat sb;
    char *mapped;

    /* 打开文件 */
    if ((fd = open (update_path1, O_RDWR)) < 0)
    {
        //if ((fd = open (update_path2, O_RDWR)) < 0)
        {
             printf("no update file\n");
             return -1;
        }
    }
    /* 获取文件的属性 */
    if ((fstat (fd, &sb)) == -1)
    {
        printf("update file fstat err\n");
        return -1;
    }
    filelen = sb.st_size;

    /* 将文件映射至进程的地址空间 */
    if ((mapped = (char *) mmap (NULL, sb.st_size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0)) == (void *) -1)
    {
        printf("update file mmap err\n");
    }
    /* 映射完后, 关闭文件也可以操纵内存 */
    close(fd);
    
    printf("update file %d bytes\n", filelen);
    /* 修改一个字符,同步到磁盘文件 */

    if(1 == check_firmware_databuf((const uint8_t*)mapped, filelen)) {
        firmware_buf = (const uint8_t*)mapped;
        printf("update file check ok\n");
        update_start();
    }
        
    return 1;
}





#define ERR_MIGIC_NOT_MATCH "magic numb do not match"
#define ERR_VERSION_NOT_MATCH "version numb do not match"

uint8_t slave_firmware_loop(void (*pfunc_write)(uint8_t *data, uint32_t len))
{
#define retry_time 1000			//ms
#define disconnect_time 500000    
	//static uint32_t wcnt=0;	//改用计时器，更好控制重发和断开的逻辑
	uint32_t len, tlen, ack_idx;
	uint8_t ret= 0;
	const bin_head *pdata= (const bin_head*)firmware_buf;
	updata_bak_region *pack= (updata_bak_region*)(pack_buf);
    printf("task_send_len is %d\r\n", task_send_len);
	if(task_send_len)
	{
		tlen= task_send_len;
		ack_idx= get_slave_firmware_ack();
        if(ack_idx >= 0xffff0000) {
            if(ack_idx == 0xffffffff) {
                printf("slave ack %s\r\n", ERR_MIGIC_NOT_MATCH);
            }else if(ack_idx == 0xfffffffe) {
                printf("slave ack %s\r\n", ERR_VERSION_NOT_MATCH);
            }
            printf("slave ack err nb %x\n", ack_idx);
            update_end();
            return 0;
        }
		if(ack_idx < tlen)
		{
			
			/*获取从机已接收的字节数（序号）*/
            printf("idx %d /  %d\n", ack_idx, pack->region_idx + pack->data_len);
			if(ack_idx == pack->region_idx + pack->data_len){
				pack->region_idx+= pack->data_len;
				update_timer();
			}
//			else if(pack->region_idx == 0){
//				//pack->region_idx =1;
//			}
			else
            {
			
				if(1 == fw_get_interval_disconnect(disconnect_time)){
					printf("err, firmware send time out: %d/ %d\n",ack_idx, pack->region_idx + pack->data_len);
					update_end();
					return ret;
				}
				
				if(1 == fw_get_interval_retry(retry_time)){
					//dbg("firmware pend: %d/ %d, resend\n",ack_idx, pack->region_idx + pack->data_len);
					printf("firmware pend: %d/ %d,  %d %d resend\n",ack_idx, pack->region_idx + pack->data_len,
					            pack->region_idx, pack->data_len);
					fw_uptime_retry();	
				}
				else
					return ret;	
			}			
			
			/*从机序号已更新立即发，或者超时重发*/
			len= pack_firmware((uint8_t*)pdata, (uint8_t*)pack_buf);
			if(len>0){
				//dbg("total_send_len %d %d %d\n", pack->region_idx , tlen, task_send_len);
			}
			//write(fd, pack, len+BAK_REGION_HEAD_LEN);	
            pfunc_write((uint8_t*)pack_buf, len+BAK_REGION_HEAD_LEN);	
		}
		else {
			if(ack_idx == task_send_len)	
				dbg("firmware send ok\r\n");
			update_end();
			ret=1;
		}
	}
	return ret;
}






